Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/8917#discussion_r40733941
--- Diff: docs/sql-programming-guide.md ---
@@ -1320,6 +1320,40 @@ Configuration of Parquet can be done using the
`setConf` method on `SQLContext`
<table class="table">
<tr><th>Property Name</th><th>Default</th><th>Meaning</th></tr>
<tr>
+ <td><code>spark.sql.planner.sortMergeJoin</code></td>
+ <td>true</td>
+ <td>
+ When true, use sort merge join (as opposed to hash join) by default
for large joins.
+ </td>
+</tr>
+<tr>
+ <td><code>spark.sql.codegen</code></td>
--- End diff --
We don't want to document this either as we plan to get rid of it.
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